Sep 15, 1963:
Four black schoolgirls killed in Birmingham
On this day in 1963, a bomb explodes during Sunday morning services in the 16th Street Baptist Church in Birmingham, Alabama, killing four young girls.
http://www.history.com/this-day-in-history/four-black-schoolgirls-killed-in-birminghamWorld War1
Sep 15, 1914:
First trenches are dug on the Western Front
In the wake of the Battle of the Marne—during which Allied troops halted the steady German push through Belgium and France that had proceeded over the first month of World War I—a conflict both sides had expected to be short and decisive turns longer and bloodier, as Allied and German forces begin digging the first trenches on the Western Front on September 15, 1914.
The trench system on the Western Front in World War I—fixed from the winter of 1914 to the spring of 1918—eventually stretched from the North Sea coast of Belgium southward through France, with a bulge outwards to contain the much-contested Ypres salient. Running in front of such French towns as Soissons, Reims, Verdun, St. Mihiel and Nancy, the system finally reached its southernmost point in Alsace, at the Swiss border. In total the trenches built during World War I, laid end-to-end, would stretch some 25,000 miles—12,000 of those miles occupied by the Allies, and the rest by the Central Powers.
http://www.history.com/this-day-in-history/first-trenches-are-dug-on-the-western-frontSep 15, 1978:
Ali defeats Spinks to win world heavyweight championship
On this day in 1978, boxer Muhammad Ali defeats Leon Spinks at the Louisiana Superdome in New Orleans to win the world heavyweight boxing title for the third time in his career, the first fighter ever to do so. Following his victory, Ali retired from boxing, only to make a brief comeback two years later. Ali, who once claimed he could "float like a butterfly, sting like a bee," left the sport permanently in 1981.
http://www.history.com/this-day-in-history/ali-defeats-spinks-to-win-world-heavyweight-championshipSorry mods if these aren't relevant to this forum, it's just a site I read daily and gather interesting tidbits from. Please delete if inappropriate.